Wherever you go during Chanukah, go with the "Rambam" design Go To menorah. You can power it with batteries or a USB port which gives you the ultimate in convenience and ease of use. This small menorah packs a lot...in addition to sequential lighting, it also features multiple lighting patterns. You can go from sequential to flashing to ripple effect to chasing. Use either 2 AA batteries or a USB cable connected to a computer or phone charger of max 5.1 volt output. Menorah comes with suction cup for easy hanging. Battery compartment has safety closure which is easily opened with a Philips screw driver. Menorah measures 6" x 1.6" x 5".